1993_Motorola_Linear_Interface_ICs_Vol_2.pdf

Symbol Pin
DO-D7 1-4,
21-24
VEE(D) 5
Conv 6
Conv 7
FT 8
DGnd 9
FH 10
Blank 11
BRT 12
Sync 13
Ref- 14
Ref + 15
Comp 16
AGnd 17
Out- 18
Out + 19
VEE(A) 20
MC10324
PIN FUNCTION DESCRIPTION
Description
Data inputs. DO is the lSB and D7 is the MSB. Inputs are ECl compatible. Maximum update
rate is typically 60 MHz. The eight bits control the Gray Scale amplitude only, and do not
involve the Sync or Blank levels.
Connect to - 5.2 V, ± 10%. This supply should be referenced to digital ground.
Convert input. The rising edge latches data and controls if FT = O. May be used single-ended
(with Pin 7 at a fixed voltage), or differentially with Pin 7.
Convert input. The falling edge latches data and controls if FT = O. May be used
single-ended (with Pin 6 at a fixed voltage), or differentially with Pin 6.
Feedthrough. When high, the internal latches are transparent, and Pins 6 and 7 are unused.
When low, data and controls are latched by Pins 6 and 7.
Connect to system digital ground. This pin must be within 100 mV of AGnd (Pin 17).
Force High. A logic high internally sets data inputs = 1, overriding external data inputs.
A logic high overrides data inputs, sets the outputs to the video blanking level.
Bright. A logic high increases the Gray Scale output level by = 11%, providing an enhanced
display. Does not affect Sync or Blank.
A logic high overrides all other inputs, and sets the output to video sync level.
Inverting Reference input. A high impedance input, normally set to a negative DC voltage in
the range of-0.8 to-1.7 V. Can be used to modulate the output.
Noninverting reference input. A virtual ground, current supplied to this pin sets the maximum
output current.
Compensation. A capaCitor between this pin and Pin 20 stabilizes the reference amp.
Connect to system analog ground. This pin must be within 100 mV of DGnd (Pin 9).
A high impedance current output. Video voltage levels are produced when connected to a
75 n cable with appropriate terminations. This output provides a "sync down" waveform. If
unulied, connect to Pin 17.
Complementary output provides a "sync up" waveform. If unused, connect to Pin 17.
Connect to - 5.2 V, ± 10%. This supply should be referenced to analog ground.
Figure 1. Test Circuit
-1.95V
or
-O.B1V
DO
I
I
I
D7
FT
FH
BRT
BU<
Sync
MC10324
DuI-
Quit
Ref-
Reft
Comp
VOul-
37.m
VOuit
37.50
Vref
_1.115mA
1.0k
DGnd
0.01
VEE(D)
VEE(A)
0.1
-5.2V
nIL Cony AGnd
40MHz NC Conv
MOTOROLA LINEAR/INTERFACE ICs DEVICE DATA
6-79